| /* |
| * ARM kernel loader. |
| * |
| * Copyright (c) 2006-2007 CodeSourcery. |
| * Written by Paul Brook |
| * |
| * This code is licenced under the GPL. |
| */ |
| |
| #include "hw.h" |
| #include "arm-misc.h" |
| #include "sysemu.h" |
| |
| #define KERNEL_ARGS_ADDR 0x100 |
| #define KERNEL_LOAD_ADDR 0x00010000 |
| #define INITRD_LOAD_ADDR 0x00800000 |
| |
| /* The worlds second smallest bootloader. Set r0-r2, then jump to kernel. */ |
| static uint32_t bootloader[] = { |
| 0xe3a00000, /* mov r0, #0 */ |
| 0xe3a01000, /* mov r1, #0x?? */ |
| 0xe3811c00, /* orr r1, r1, #0x??00 */ |
| 0xe59f2000, /* ldr r2, [pc, #0] */ |
| 0xe59ff000, /* ldr pc, [pc, #0] */ |
| 0, /* Address of kernel args. Set by integratorcp_init. */ |
| 0 /* Kernel entry point. Set by integratorcp_init. */ |
| }; |
| |
| /* Entry point for secondary CPUs. Enable interrupt controller and |
| Issue WFI until start address is written to system controller. */ |
| static uint32_t smpboot[] = { |
| 0xe3a00201, /* mov r0, #0x10000000 */ |
| 0xe3800601, /* orr r0, r0, #0x001000000 */ |
| 0xe3a01001, /* mov r1, #1 */ |
| 0xe5801100, /* str r1, [r0, #0x100] */ |
| 0xe3a00201, /* mov r0, #0x10000000 */ |
| 0xe3800030, /* orr r0, #0x30 */ |
| 0xe320f003, /* wfi */ |
| 0xe5901000, /* ldr r1, [r0] */ |
| 0xe3110003, /* tst r1, #3 */ |
| 0x1afffffb, /* bne <wfi> */ |
| 0xe12fff11 /* bx r1 */ |
| }; |
| |
| static void main_cpu_reset(void *opaque) |
| { |
| CPUState *env = opaque; |
| |
| cpu_reset(env); |
| if (env->boot_info) |
| arm_load_kernel(env, env->boot_info); |
| |
| /* TODO: Reset secondary CPUs. */ |
| } |
| |
| static void set_kernel_args(struct arm_boot_info *info, |
| int initrd_size, void *base) |
| { |
| uint32_t *p; |
| |
| p = (uint32_t *)(base + KERNEL_ARGS_ADDR); |
| /* ATAG_CORE */ |
| stl_raw(p++, 5); |
| stl_raw(p++, 0x54410001); |
| stl_raw(p++, 1); |
| stl_raw(p++, 0x1000); |
| stl_raw(p++, 0); |
| /* ATAG_MEM */ |
| /* TODO: handle multiple chips on one ATAG list */ |
| stl_raw(p++, 4); |
| stl_raw(p++, 0x54410002); |
| stl_raw(p++, info->ram_size); |
| stl_raw(p++, info->loader_start); |
| if (initrd_size) { |
| /* ATAG_INITRD2 */ |
| stl_raw(p++, 4); |
| stl_raw(p++, 0x54420005); |
| stl_raw(p++, info->loader_start + INITRD_LOAD_ADDR); |
| stl_raw(p++, initrd_size); |
| } |
| if (info->kernel_cmdline && *info->kernel_cmdline) { |
| /* ATAG_CMDLINE */ |
| int cmdline_size; |
| |
| cmdline_size = strlen(info->kernel_cmdline); |
| memcpy(p + 2, info->kernel_cmdline, cmdline_size + 1); |
| cmdline_size = (cmdline_size >> 2) + 1; |
| stl_raw(p++, cmdline_size + 2); |
| stl_raw(p++, 0x54410009); |
| p += cmdline_size; |
| } |
| if (info->atag_board) { |
| /* ATAG_BOARD */ |
| int atag_board_len; |
| |
| atag_board_len = (info->atag_board(info, p + 2) + 3) >> 2; |
| stl_raw(p++, 2 + atag_board_len); |
| stl_raw(p++, 0x414f4d50); |
| p += atag_board_len; |
| } |
| /* ATAG_END */ |
| stl_raw(p++, 0); |
| stl_raw(p++, 0); |
| } |
| |
| static void set_kernel_args_old(struct arm_boot_info *info, |
| int initrd_size, void *base) |
| { |
| uint32_t *p; |
| unsigned char *s; |
| |
| /* see linux/include/asm-arm/setup.h */ |
| p = (uint32_t *)(base + KERNEL_ARGS_ADDR); |
| /* page_size */ |
| stl_raw(p++, 4096); |
| /* nr_pages */ |
| stl_raw(p++, info->ram_size / 4096); |
| /* ramdisk_size */ |
| stl_raw(p++, 0); |
| #define FLAG_READONLY 1 |
| #define FLAG_RDLOAD 4 |
| #define FLAG_RDPROMPT 8 |
| /* flags */ |
| stl_raw(p++, FLAG_READONLY | FLAG_RDLOAD | FLAG_RDPROMPT); |
| /* rootdev */ |
| stl_raw(p++, (31 << 8) | 0); /* /dev/mtdblock0 */ |
| /* video_num_cols */ |
| stl_raw(p++, 0); |
| /* video_num_rows */ |
| stl_raw(p++, 0); |
| /* video_x */ |
| stl_raw(p++, 0); |
| /* video_y */ |
| stl_raw(p++, 0); |
| /* memc_control_reg */ |
| stl_raw(p++, 0); |
| /* unsigned char sounddefault */ |
| /* unsigned char adfsdrives */ |
| /* unsigned char bytes_per_char_h */ |
| /* unsigned char bytes_per_char_v */ |
| stl_raw(p++, 0); |
| /* pages_in_bank[4] */ |
| stl_raw(p++, 0); |
| stl_raw(p++, 0); |
| stl_raw(p++, 0); |
| stl_raw(p++, 0); |
| /* pages_in_vram */ |
| stl_raw(p++, 0); |
| /* initrd_start */ |
| if (initrd_size) |
| stl_raw(p++, info->loader_start + INITRD_LOAD_ADDR); |
| else |
| stl_raw(p++, 0); |
| /* initrd_size */ |
| stl_raw(p++, initrd_size); |
| /* rd_start */ |
| stl_raw(p++, 0); |
| /* system_rev */ |
| stl_raw(p++, 0); |
| /* system_serial_low */ |
| stl_raw(p++, 0); |
| /* system_serial_high */ |
| stl_raw(p++, 0); |
| /* mem_fclk_21285 */ |
| stl_raw(p++, 0); |
| /* zero unused fields */ |
| memset(p, 0, 256 + 1024 - |
| (p - ((uint32_t *)(base + KERNEL_ARGS_ADDR)))); |
| s = base + KERNEL_ARGS_ADDR + 256 + 1024; |
| if (info->kernel_cmdline) |
| strcpy (s, info->kernel_cmdline); |
| else |
| stb_raw(s, 0); |
| } |
| |
| void arm_load_kernel(CPUState *env, struct arm_boot_info *info) |
| { |
| int kernel_size; |
| int initrd_size; |
| int n; |
| int is_linux = 0; |
| uint64_t elf_entry; |
| target_ulong entry; |
| uint32_t pd; |
| void *loader_phys; |
| |
| /* Load the kernel. */ |
| if (!info->kernel_filename) { |
| fprintf(stderr, "Kernel image must be specified\n"); |
| exit(1); |
| } |
| |
| if (!env->boot_info) { |
| if (info->nb_cpus == 0) |
| info->nb_cpus = 1; |
| env->boot_info = info; |
| qemu_register_reset(main_cpu_reset, env); |
| } |
| |
| pd = cpu_get_physical_page_desc(info->loader_start); |
| loader_phys = phys_ram_base + (pd & TARGET_PAGE_MASK) + |
| (info->loader_start & ~TARGET_PAGE_MASK); |
| |
| /* Assume that raw images are linux kernels, and ELF images are not. */ |
| kernel_size = load_elf(info->kernel_filename, 0, &elf_entry, NULL, NULL); |
| entry = elf_entry; |
| if (kernel_size < 0) { |
| kernel_size = load_uimage(info->kernel_filename, &entry, NULL, |
| &is_linux); |
| } |
| if (kernel_size < 0) { |
| kernel_size = load_image(info->kernel_filename, |
| loader_phys + KERNEL_LOAD_ADDR); |
| entry = info->loader_start + KERNEL_LOAD_ADDR; |
| is_linux = 1; |
| } |
| if (kernel_size < 0) { |
| fprintf(stderr, "qemu: could not load kernel '%s'\n", |
| info->kernel_filename); |
| exit(1); |
| } |
| if (!is_linux) { |
| /* Jump to the entry point. */ |
| env->regs[15] = entry & 0xfffffffe; |
| env->thumb = entry & 1; |
| } else { |
| if (info->initrd_filename) { |
| initrd_size = load_image(info->initrd_filename, |
| loader_phys + INITRD_LOAD_ADDR); |
| if (initrd_size < 0) { |
| fprintf(stderr, "qemu: could not load initrd '%s'\n", |
| info->initrd_filename); |
| exit(1); |
| } |
| } else { |
| initrd_size = 0; |
| } |
| bootloader[1] |= info->board_id & 0xff; |
| bootloader[2] |= (info->board_id >> 8) & 0xff; |
| bootloader[5] = info->loader_start + KERNEL_ARGS_ADDR; |
| bootloader[6] = entry; |
| for (n = 0; n < sizeof(bootloader) / 4; n++) |
| stl_raw(loader_phys + (n * 4), bootloader[n]); |
| if (info->nb_cpus > 1) |
| for (n = 0; n < sizeof(smpboot) / 4; n++) |
| stl_raw(loader_phys + info->ram_size + (n * 4), smpboot[n]); |
| if (old_param) |
| set_kernel_args_old(info, initrd_size, loader_phys); |
| else |
| set_kernel_args(info, initrd_size, loader_phys); |
| } |
| } |
